Presumably unsatisfied with market share or cost, in about 1990 the beancounters at Dominos decided to rejigger the cheese unto blandness while deliberately poisoning the sauce; their pizza became, in a word, vile. I suspect the new formula saved the company 50 cents per pizza, but it lost me as a customer for 20 years. The sauce formula changed again around 2005 (IIRC) to cause less projectile vomiting IMHO, but their mix of cheese never recovered. Today's Dominos Pizza is but a winsome shadow of what it was in those great early days when the company grew without bounds and the brand was almost eponymous with their one and only product, pizza.
Today, while pizza cheese is widely dissed for its pedestrian lack of flavor and oversmoothed texture, once upon a time, it was something much much more.
The problem is that American chocolate is something of the worst in the world, and so there’s no doubt that the (cocoa) bean counters negatively affected the Cadbury brand and taste in order to shave off a few cents.
Ingredient Level added (g/100g Blend)
Casein and caseinates 23.00
Vegetable oil 25.00
Emulsifying salts 2.00
Flavour enhancer 2.00
Acid regulator 0.40
There is a different but similar product, processed cheese, that is actually
made with cheese and various additives to manipulate its taste, texture,
rheological characteristics etc. The difference with APC is that APC does not
include cheese (but as the table above shows, it does include caseins).
[Note that the numbers above add to 102.04 so there may be a mistake, or the
numbers are only estimates. Also note I have an old edition of the book.
Numbers and ingredients may well have changed more recently.]